Mixing Tyres/Poor Handling

[MACK]

[ref]MACK[/ref] I'm sure you were kicking yourself as hard as I was when I finally changed the easiest (and arguably most obvious) factor that can affectt steering. I'm also sure you're similarly happy to have a car that holds its line now! 8)

Sure was and sure am!
I can laugh about it now...........just!!! :rofl: :rofl:

 

[andyf1140]

When I bought mine it had budget tyres all round and handled fine. I changed the rears for Avons and it was positively dangerous. Now I have put Avons on the front as well it's spot on again....

 

[road warrior]

Two things have become clear since running my Z4 and hanging around the forums, these cars are unusually sensitive to changes in tyres/pressures, suspension/bushes, alignment and wear of course.
2nd, sorting it out based on others experience is hit-and-miss. Few cars are alike now, what with swapping from RFT's, wheel size changes, non-OEM springs and bushes, alignment changes and wear, then it's always proven difficult to do anything other than work through the list of possibles.
It took me ages! Replacing a broken rear spring, saggy bushes, new non-RFT tyres, a Hunter 4-wheel alignment and tyre pressures got rid of 80% of the problem, it took 2 alignments with someone who knew what they were doing and was able to take account of changes (rather than sticking to the computer's specs) to finally sort it.

Your absolutely spot on and I agree, nobody has the same setup or wheels or tyres or amount of wear or even tyre pressures so impossible to say, I do feel that tyres need to bed in before adjusting anything, that said our stupid electric steering is bloody awful and when I do get rid of my z4 it will be for that reason.

 

[Jembo]

Two things have become clear since running my Z4 and hanging around the forums, these cars are unusually sensitive to changes in tyres/pressures, suspension/bushes, alignment and wear of course.
2nd, sorting it out based on others experience is hit-and-miss. Few cars are alike now, what with swapping from RFT's, wheel size changes, non-OEM springs and bushes, alignment changes and wear, then it's always proven difficult to do anything other than work through the list of possibles.
It took me ages! Replacing a broken rear spring, saggy bushes, new non-RFT tyres, a Hunter 4-wheel alignment and tyre pressures got rid of 80% of the problem, it took 2 alignments with someone who knew what they were doing and was able to take account of changes (rather than sticking to the computer's specs) to finally sort it.

Your absolutely spot on and I agree, nobody has the same setup or wheels or tyres or amount of wear or even tyre pressures so impossible to say, I do feel that tyres need to bed in before adjusting anything, that said our stupid electric steering is bloody awful and when I do get rid of my z4 it will be for that reason.

Worth trying the steering in a M, significantly different